Disclosed are systems, methods and computer program products for motivating and rewarding a student to study new subjects by controlling student's access to an electronic device based on results of studying. An example method includes generating, by a hardware processor, an exercise for a user based on a learning criteria; associating the exercise with an access control policy for at least one user's device; providing the exercise to the user and receiving a user's answer to the exercise; determining based on the user's answer whether to apply or not apply to the user's device the access control policy associated with the exercise; and based on the determination whether to apply or not apply the access control policy to the user's device, controlling or not controlling access of the user to the user's device.